dempsey



R, M. DEMPSEY.

Smut Mill.

Patented July 8, 1856'.

N. PETERS Pnumulho n her. Wnlllinghzn. D. c.

UNITED sraas r rnur OFFICE. to

R. M. DEMPSEX, OE INDIANAPOLIS, INDIANA.

SMUT-MACHINE.

Specification of Letters Patent No. 15,284, dated July-8, 1856.

To all whom it may concern:

Be it known that I, R. M. DEMPSEY, of Indianapolis, in the county ofMarion and State of Indiana, have invented a new and ImprovedSmutMachine; and I do hereby declare that the following is a full,clear, and exact description of the same, reference being had to theannexed drawing, making a part of this specification, said drawing beinga vertical section of my improvement.

To enable those skilled in the art to fully understand and construct myinvention, I will proceed to describe it.

A, represents a rectangular framing; and B, represents a vertical shaftplaced within the framing at its center; the lower end of the shaftbeing stopped at (a).

C, represents a cylindrical case or curb which is secured in the upperpart of the frame A;and D, is an inverted conical screen formed of wirecloth or perforated sheet metal. This screen is fitted within the caseor curb C, as shown in the drawing.

F, represents a concave circular head which is fitted on the shaft B.The upper surface of the head is the concave surface, and verticalspikes or rods (6), are driven in it.

F, represents a stationary head which is fitted on the upper end of thecase or curb C. A small hopper G, is placed at the center of the head F,the shaft B, passing through the hopper and having its upper bearing atthe center of a cross piece (0), on the frame A.

To the under surface of the head E, wings or fans (cl), are attached,the lower ends of which extend downward nearly to a horizontal plate(6), which forms the bottom of the screen D.

G represents a chamber immediately below the plate (6) ;and H, is a fanbox in which a fan I, is placed; said fan being on the shaft B. At thecenter of the plate (6), there is placed a small perforated cone (f),through the center of which the shaft B, passes;and (g), is a spoutwhich communicates with the space below the concave head. E, and a spoutJ, which is attached to the side of the frame A; the lower end of thespout J, communicating with the fanbox H. The upper part of the spout J,has a valve K, fitted within it. This valve is formed of a plate equalin width to the spout J, and pivoted at its lower end; the

upper end of the plate having an arm (h,) attached to it.

L, represents a screen placed within the spout J, as plainly shown inthe drawing.

The cylinder or curb C, has an outlet or small pipe communicating withit at any proper point, and the upper or concave surface of the head E,and the undersurface of the head F, are grooved or ridged concentricallyfrom their centers to their peripheries.

The spout J, gradually increases in width from its lower to its upperend.

The grain to be scoured and cleansed passes through the hopper G, downupon the concave E, and motion being given the shaft B, in any propermanner, the grain is subjected to the necessary scouring and beating bythe rods or spikes (b), and the grain passes, in consequence ofcentrifugal force, from the center of the head E, toward its peripheryand over the edge of .the head and falls into the space below the headand is carried around by the wings (cl), into the spout (g); the grainin its passage'beingsubjected to a blast generated by the fan I, and thesmut scoured from the grain by the rods or spikes (b), is blown throughthe wire cloth or perforated conical screen D, and passes through a pipeor passage communicating with the case or curb C. This is the object ofthe case or curb, it prevents the dirt and smut from passing through themachine and mixing with the grain after being sepa rated from it. Thegrain deprived of smut and dirt passes through the spout (g), and fallsinto the spout J. The heavy, sound grain resisting the force of theblast generated by the fan and falling from the lower end of the spoutJ, while the chaff, light or imperfect grain, cockle etc., will be blownupward in the spout J; the light foreign substances passing out of thetop of the spout, while the cockle and heavier substances will passthrough the screen L, and will be discharged through an aperture Theblast in the spout J, may be increased or diminished as desired, byregulating the valve or plate K, and thereby expanding or contractingthe spout J ,and the spout (g), may be curved as shown in the drawing soas to check the passage of the grain through it, thereby preventing thegrain from descending too rapidly into the spout J.

The above machine is extremely simple, inverted conical screen D, thehead E, hav- 10 portable, economical to manufacture, opering Wings (cl),attached to its under sides as ates well, and there are no parts liableto shown and its upper surface corrugated as get out of repair. shown orin any other manner for the pur- 5 Having thus described my inventionWhat poses specified.

I claim as new and desire to secure by Let- R. M. DEMPSEY. ters Patentis, Witnesses:

The concave head E, having vertical rods CHARLES FISHER, or spikes (6),attached and fitted Within an EDW. DAVIS.

